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Label chopped intervals in sequence

Source: R/labels.R
lbl_seq.Rd

lbl_seq() labels intervals sequentially, using numbers or letters.

Usage

lbl_seq(start = "a")

Arguments

start

String. A template for the sequence. See below.

Value

A function that creates a vector of labels.

Details

start shows the first element of the sequence. It must contain exactly one character out of the set "a", "A", "i", "I" or "1". For later elements:

  • "a" will be replaced by "a", "b", "c", ...

  • "A" will be replaced by "A", "B", "C", ...

  • "i" will be replaced by lower-case Roman numerals "i", "ii", "iii", ...

  • "I" will be replaced by upper-case Roman numerals "I", "II", "III", ...

  • "1" will be replaced by numbers "1", "2", "3", ...

Other characters will be retained as-is.

See also

Other labelling functions: lbl_dash(), lbl_discrete(), lbl_endpoints(), lbl_glue(), lbl_intervals(), lbl_manual(), lbl_midpoints()

Examples

chop(1:10, c(2, 5, 8), lbl_seq())
#>  [1] a b b b c c c d d d
#> Levels: a b c d

chop(1:10, c(2, 5, 8), lbl_seq("i."))
#>  [1] i.   ii.  ii.  ii.  iii. iii. iii. iv.  iv.  iv. 
#> Levels: i. ii. iii. iv.

chop(1:10, c(2, 5, 8), lbl_seq("(A)"))
#>  [1] (A) (B) (B) (B) (C) (C) (C) (D) (D) (D)
#> Levels: (A) (B) (C) (D)